कौन सा क्रम \(a_n=3^n-1\) से बने पहले चार पद दिखाता है?
Which sequence shows the first four terms of \(a_n=3^n-1\)?
Explanation opens after your attempt
A. (2,8,26,80)
Concept
\(3^1-1=2\), \(3^2-1=8\), \(3^3-1=26\), and \(3^4-1=80\). Evaluate the power and subtract (1).
Why this answer is correct
The correct answer is A. (2,8,26,80). \(3^1-1=2\), \(3^2-1=8\), \(3^3-1=26\), and \(3^4-1=80\). Evaluate the power and subtract (1).
Exam Tip
\(3^1-1=2\), \(3^2-1=8\), \(3^3-1=26\), \(3^4-1=80\)। घात निकालकर (1) घटाएँ।
Login to save your score, XP, coins and progress.
